Duplex air-brake system.



'PATENTED DEC. 29, 1903.

H. NIGHTINGALB. DUPLEX-AIR BRAKE SYSTEM.

APPLIGATION FILED DEC. 8, 1902.

3 SEEETSSHEBT 1.

NO MODEL.

nfiliam 23 THE Nonms Pnsns cu. Pnmouma. WASHINGTON. u. c.

PATENTED DEC. 29, 1903.

WQH. NIGHTINGALE. DUPLEX AIR BRAKE SYSTEM.

APPLIGATION FILED 11150.8, 1902.

s SHEETS-SHEET s. Fiq. 6

N0 MODEL.

- lnvcfl cor "MliamHMgfifin alc UNITED STATES Patented December 29,1903.

PATENT ()FFICE.

WILLIAM H. NIGHTINGALE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOHNE. REYBURN, OF PHILADELPHIA, PENNSYLVANIA.

DUPLEX AIR-BRAKE SYSTEM.

SPECIFICATION forming part of Letters Patent No. 748,302, dated December29, 1903.

Application filed December 8, 1.902. Serial No. 134,224. (No model.)

T at whom it may concern:

Beit known that 1, WILLIAM H. NIGHTIN- GALE, a citizen of the UnitedStates, residing at Philadelphia, in the county of Philadelphia andState of Pennsylvania,have in vented certain new and usefulImprovementsin Duplex Air-Brake Systems, of which the following is aspecification.

This invention relates to improvements in air-brakes, and especially toimprovements over my previous application for a duplex airbrake systemfiled May 20, 1902, Serial No. 108,157,and allowed August 29,1902. Inmany cars on account of difierence in construction it is found to benecessary to provide for placing the cylinders lower on the car and toprovide means to couple the pulling mechanism of the cylinders to thetruck brake-lever, which will clear the motor-case without liability tochange form owing to the pulling strains to which itis subjected, as isthe case when constructed with several bends and 0&- sets, asheretofore, to clear the motor-case. The duplex cylinder has also beenimproved to cheapen and facilitate its manufacture,

to provide more ready accessibility to its pistons, to guard againstdefects which are liable to occur when the cylinders are formedintegral, and also for renewals owing to Wear, as thedefective part cannow be replaced without the loss of other parts still good, which couldnot be done as previously .constructed. With the present constructionthe single cylinders innse in othersystems of brakes canbe utilized inmaking changes to this system by attaching them to each side of thecentral connection, each cylinder and the central connection havingindependent means for their attachment to the car, so

that the cylinders may be separately detached for inspection, repairs,or renewal.

Other improvements are embodied as. to

means of lubrication and wilhbe'mgre fully.

, parts are designated by similar figures of reference, illustrate thevarious improvements and their application.

Figure 1 shows in elevation,with some parts in section the cylinders..attaohed to car and their connection to one of its trucks, the.

trucks at each end of the car being alike and coupled alike to thecylinders. Fig. 2 is a plan of Fig. 1 with the car-flooring removed.

Fig. 3 is a central vertical section of the cylinders and their centralconnection, the pistons and pipe piston-rods not being in section. Fig.4 is a central horizontal section of the parts shown in Fig. 3 with someparts of the central connection on line v 1), Figs. 3, 4.

In the present construction there is a central connection 1, to whichthe cylinders 2 3 are attached at theirinner open ends, one at eachside, (see Figs. 3, 4, 5,) connection 1 having turned projections 4 5 ateach side, over whichthe cylinders snugly fit, while a central flange 6on the connection and flanges 7 8 on the cylinders provide the meanswhereby all may be seen red firmly together by bolts 9. Recesses 10remove the metal not required in flange 6 between the bolts and reducethe weight. The connection 1 is provided with an air-inlet 1l,with acentral partition 12 and Sports 13 14 forair admission to the cylinders.

At the top of the connection a flat seat 15 is formed to receive thehand brake-lever 16, and it is tapped for the fulcrum-bolt 17. Cylinders2 3 now have integral outer heads l8 19 instead of removable heads, asheretofore, and with pockets 20 21 formed therein for holdinglubricating-packing to surround and oil the piston-rods and wipe off anydust which may adhere to the piston-rods and prevent its entrance intothe cylinders, where it is destructive of the cylinders and thepistonpacking. At the top of the cylinders, near theirouter ends, areknees 22 23, by which they are secured to a strap 24, which alsoreceives fulcrum-bolt 17, and the strap is secured to cross-sills 25 26under the car 27. The strap 24 is unnecessary on some cars, in

which case knees 22 23 and bolt 17 are secured directly to the carsunderfraining.

By the means here described the cylinders can be readily and'securelyattached to the various constructions of cars and can be ele- Vated moreor less to suit different requirements, as found. Within the cylindersare pistons 28 29, as illustrated in the previous application or of anysuitable construction, and having attached piston-rods 3O 31 ot' thetubular or pipe construction, which connect them to inner cross-heads 3233 by pins 34 35, which pass through the pipes and crossheads, andbosses 36, formed on the crossheads and entering the pipes. By thisconstruction it is no longer necessary to employ the push-rods, asheretofore, saving considerable expense and weight. The inner crossheadsare attached to outer cross-heads 37 38 (38 not shown) by rods 39 40, asin the previous invention. Springs 41 42 are used, as heretofore, toreturn the pistons when the pressure is removed.

Compressed air from the receiver (not shown) enters connection 1 throughpipe 43, and for the purpose of lubricating the cylinders and theirpistons a pipe-T 44 is introduced into the pipe, and an oil-cup 45 ofany suitable construction, but preferably a needlecup, is theretoattached, so that lubricating material may regularly flow to thecylinders with the inflowing air. A jaw 46 is formed on or attached tothe live brake-lever 47 of the truck, (see Figs. 1, 2,) and therein issecured the curved end 48 of brake connection 49, its section beingrectangular to resist the tendency to straighten, the curve formationcarrying the rod up and over the motor-case 50, while the movement ofthe lever, the rod,

and the piston travel are much less than by the former invention. Theinner end of the brake connection 49 is attached to an intermediatelever 51, fulcrumed on the car-frame by pin 52, below which are a seriesof pinholes 53, so that connection 49 maybe attached for differentleverages. Below con-' nection 49 a rod 54'is attached, which at itsopposite end is attached to cross-head 37 by a slotted opening 55, whichpermits the application of the hand-brake without moving the pistons.Live lever 47=continues upward from jaw 46, and at its upper end one endof hand brake-rod 56 is attached, the other end being attached to handbrake-lever 16, operated by rod 57, leading from the hand-brakemechanism on the car-platform.

Each truck-brake is operated as just described, the chain 58 permittingthe operation of the power-brake without moving the hand-brakemechanism. Supporting-lugs 59, formed on cylinders 2 3, carry rods 39 40and. maintain the cross-heads in a level position.

I claim-- I. In a brake, duplex cylinders having a separable centralconnection with means to attach each cylinder and the connectionindependently to the car, an air-passage to the connection, a partitionin the passage and a port at each side of the partition leading intoeach of the duplex cylinders aforesaid. v

2. In a brake, duplex cylinders having integral heads at their outerends, an independent central connection to which they are attached attheir inner open ends, with independent means for their attachment tothe car at difierent heights, an air-passage to the central connection,ports therefrom to the cylinders inner ends, pistons in the cylindersand connections therefrom to brakes located upon trucks supporting thecar whereto the cylinders are attached.

3. In a brake, duplex cylinders having integral heads at their outerends, a knee on each cylinder, a strap to which the knees are secured,and means to secure the strap to the car at difierent heights,lubricating and dustexcluding material pockets in the heads, a centralconnection to which the cylinders are independently secured at theirinner ends, an air passage to the central connection and therefromindependently to each cylinder, pistons in the cylinders actuatedindependently by pressure through the passages aforesaid, andconnections from the pistons to brake mechanism oppositely disposedunder a car to the cylinders aforesaid.

4. In a brake, duplex cylinders having heads at their outer ends whereinare pockets for the purposes set forth, the cylinders inner ends beingopen and attached to a central connection independent in constructionindependently attached to the car, and having means to introducepressure into the cylinders inner ends, pistons in the cylinders,

and means therefrom and thereby operated,

and connected to brakes located on trucks nearest the outer end of theopposite cylinder.

5. In a brake, duplex cylinders independently attached to a centralconnection, pistons within the cylinders, pipe pistonrods attached atone end to the pistons and at the opposite end to inner cross-headshaving bosses entering the pipes; outer cross-heads connected to theinner cross-heads by rods passing by the sides of the cylinders andtheir connection, lugs on the cylinders for guiding the rods, andconnections from the crossheads to the brake-levers of trucks.

6. In a brake, duplex cylinders attached to a central connection attheir inner ends, pistons in thecylinders, inner cross-heads attached topistons by cylindrical piston-rods, a second set of cross-heads attachedto the first-mentioned cross-heads in manner for their operation by thepiston and cross-head of the opposite cylinder, a car-body carrying thecylinders, trucks supporting the car, brakes on the trucks, hand-brakesconnected to the truck-brakes and independent connections for thepower-brake to the truck-brakes.

7. In a brake, a car, trucks supporting the car, brakes upon the trucks,motors in cases on the trucks, duplex brake-cylinders attached forindependent removal to a central connection between them and throughwhich pressure is separately introduced to each cylinder, a handbrake-lever fulcrumed upon the central connection, and connectionstermediate levers to the pistons of the cylintherefrom to the operativemechanisms on ders farthest removed. lo the car-platforms, and to thetruck-brakes, In testimony whereof I affix my signature attachments tothe truck-brakes independent in presence of two witnesses.

of the hand-brake connections, curved con- WILLIAM H. NIGHTINGALE.nections therefrom over the motor-cases to Witnesses:

intermediate levers having adjustable means RANSOM C. WRIGHT,

of attachment, and connections from the 'in- WILLIAM C. STOEVER.

